Dust Attenuation Curves at z $\sim$ 0.8 from LEGA-C: Precise Constraints on the Slope and 2175$Å$ Bump Strength
Ivana Barisic, Camila Pacifici, Arjen van der Wel, Caroline Straatman, Eric F. Bell, Rachel Bezanson, Gabriel Brammer, Francesco D'Eugenio, Marijn Franx, Josha … 展开作者
Ivana Barisic, Camila Pacifici, Arjen van der Wel, Caroline Straatman, Eric F. Bell, Rachel Bezanson, Gabriel Brammer, Francesco D'Eugenio, Marijn Franx, Josha van Houdt, Michael V. Maseda, Adam Muzzin, David Sobral, Po-Feng Wu
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15 pages, 10 figures, 1 table. Accepted for publication in The Astrophysical Journal
We present a novel approach to measure the attenuation curves of 485 individual star-forming galaxies with M$_*$ $>$ 10$^{10}$ M$_{\odot}$ based on deep optical spectra from the VLT/VIMOS LEGA-C survey and multi-band photometry in the COSMOS field. Most importantly, we find that the attenuation curves in the rest-frame $3000-4500$A range are typically almost twice as steep as the Milky Way, LMC, SMC, and Calzetti attenuation curves, which is in agreement with recent studies of the integrated light of present-day galaxies. The attenuation at $4500$A and the slope strongly correlate with the galaxy inclination: face-on galaxies show less attenuation and steeper curves compared to edge-on galaxies, suggesting that geometric effects dominate observed variations in attenuation. Our new method produces $2175$A UV bump detections for 260 individual galaxies. Even though obvious correlations between UV bump strength and global galaxy properties are absent, strong UV bumps are most often seen in face-on, lower-mass galaxies (10 $<$ log$_{10}$(M$_*$/M$_{\odot}$) $<$ 10.5) with low overall attenuation. Finally, we produce a typical attenuation curve for star-forming galaxies at $z\sim0.8$; this prescription represents the effect of dust on the integrated spectral energy distributions of high-redshift galaxies more accurately than commonly used attenuation laws.
Mapping Dust Attenuation at Kiloparsec Scales. III. The 2175Å Bump
Tsinghua University(清华大学);INAF–Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);The Chinese University of Hong Kong(香港中文大学)
An Attenuation Bump at z=9.3: Probing Dust Diversity at Cosmic Dawn
Università di Padova(帕多瓦大学);INAF, Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);Centro di Ateneo di Studi e Attività spaziali ”Giuseppe Colombo” - CISAS(朱塞佩·科洛姆博太空研究与活动中心);Instituto de Radioastronomía y Astrofísica, UNAM(墨西哥国立自治大学射电天文与天体物理研究所);INAF - Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Scuola Normale Superiore(比萨高等师范学院);Centro B. Segre, Accademia Nazionale dei Lincei(林琴学院B.塞格雷中心)
Galaxy UV Legacy Project: Survey Description and First Insights Into NGC 4449 Recent History of Star Formation
Gemini Observatory/NSFs NOIRLab(双子座天文台/美国国家光学红外天文研究实验室);Space Telescope Science Institute(太空望远镜科学研究所);AURA for the European Space Agency (ESA), ESA Office, Space Telescope Science Institute(欧洲航天局(ESA)办公室,太空望远镜科学研究所);Dept. of Astronomy, University of Massachusetts, Amherst(马萨诸塞大学阿默斯特分校天文学系);Department of Physics, The University of Auckland(奥克兰大学物理系);Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg(海德堡大学天文学计算研究所);University of Arizona(亚利桑那大学);Astrophysics Research Cluster, School of Mathematical and Physical Sciences, University of Sheffield(谢菲尔德大学数理科学学院天体物理学研究集群);Department of Astronomy, O(天文学系)
Mapping Dust Attenuation at Kiloparsec Scales. IV. A Dust-model Interpretation of Attenuation Curves in Nearby Galaxies
Tsinghua University(清华大学);INAF–Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);The Chinese University of Hong Kong(香港中文大学)
An empirical derivation of the average dust attenuation law at 2<z<7
Università di Padova(帕多瓦大学);INAF, Osservatorio Astronomico di Padova(意大利国家天体物理研究所帕多瓦天文台);University of Massachusetts Amherst(马萨诸塞大学阿默斯特分校);INAF, Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);Scuola Normale Superiore(比萨高等师范学院);Centro de Astrobiología (CAB), CSIC-INTA(西班牙国家技术研究委员会-国家航空航天技术研究所天体生物学中心);University of Southampton(南安普顿大学)
The AURORA Survey: The Nebular Attenuation Curve of a Galaxy at z=4.41 from Ultraviolet to Near-Infrared Wavelengths
University of Kentucky(肯塔基大学);University of California, Los Angeles(加州大学洛杉矶分校);University of Arizona(亚利桑那大学);University of California, Riverside(加州大学河滨分校);The University of Texas at Austin(德克萨斯大学奥斯汀分校);Leiden University(莱顿大学);University of Copenhagen(哥本哈根大学);University of Edinburgh(爱丁堡大学)
Dust enrichment from core-collapse supernovae and extinction curves in the high-redshift universe
The University of Tokyo(东京大学);Dipartimento di Fisica, “Sapienza” Università di Roma(罗马大学物理系);INAF/Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);INFN, Sezione Roma I(意大利国家核物理研究所罗马第一分所);Sapienza School for Advanced Studies(萨皮恩扎高等研究学院);INAF/Osservatorio Astrofisico di Arcetri(意大利国家天体物理研究所阿切尔天文台);Cosmic Dawn Center (DAWN)(宇宙黎明中心);Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯玻尔研究所);Kavli Institute for the Physics and Mathematics of the Universe (WPI)(宇宙物理与数学科学卡弗里研究所)
Deep Extragalactic VIsible Legacy Survey (DEVILS): SED Fitting in the D10-COSMOS Field and the Evolution of the Stellar Mass Function and SFR-$M_\star$ relation
First survey of Wolf-Rayet star populations over the full extension of nearby galaxies observed with CALIFA
在本星系群外存在沃尔夫-拉叶(WR)星的河外区域的搜索是一项具有挑战性的任务,因为难以探测到它们微弱的光谱特征。在这项探索性的工作中,我们开发了一种方法来执行WR签名的自动搜索,通过像素的积分场光谱(IFS)属于卡拉尔阿尔托遗产积分场区域调查,CALIFA的数据的像素分析。这种技术使我们能够建立第一个具有空间分辨信息的Wolf-Rayet丰富区域的目录,从而可以在2D背景下研究这些复合物的性质。探测技术是基于使用逐像素分析来识别蓝色WR凸块(在He II 4686 <$m附近,主要与富氮WR星WN相关)和红色WR凸块(在C IV 5808 <$m附近,与富碳WR星WC相关)。我们确定了44个WR丰富的区域分布在25个星系中的558个蓝色凸起。仅在其中5个地区发现了红色WR凸起。我们发现,在我们的样本中,大多数托管WR人口的星系都参与了某种相互作用过程。一半的宿主星系与伽马射线暴(GRB)的宿主星系具有某些共同的性质,其中WR星是GRB的潜在候选者.我们还将由CALIFA数据得到的WR性质与恒星星族合成模型进行了比较,证实了简单的恒星模型一般不能再现观测结果.我们的结论是,其他的影响,如双星通道(这可能会延长WR阶段高达10万年),快速旋转或其他物理过程,导致观测到的莱曼连续光子的损失,很可能会影响衍生WR属性,因此,应考虑在建模时的大质量恒星的演化。
Short GRB Host Galaxies. II. A Legacy Sample of Redshifts, Stellar Population Properties, and Implications for their Neutron Star Merger Origins
我们提出了69个短伽玛射线暴(GRB)的宿主星系,代表最大的统一建模的样本日期的恒星星族的性质。使用勘探恒星星族推断代码,我们共同适合每个宿主星系的光度和/或光谱。我们发现一个人口中位数红移$z=0.64^{+0.83}_{-0.32}$($68\%$信心),包括10个新的或修订的光度红移在$z\gtrsim1$。进一步得到了$t_m=0.8^{+2.71}_{-0.53}$陀螺的质量加权年龄中值,$\log(M_*/M_\odot)=9.69^{+0.75}_{-0.65}$的恒星质量,SFR= $1.44^{+9.37}_{-1.35}M_\odot$ yr $^{-1}$的恒星形成率,$\log(Z_*/Z_\odot)=-0.38^{+0.44}_{-0.42}$的恒星金属丰度,以及$A_V=0.43^{+0.85}_{-0.36}$ ~mag的尘埃衰减(68%置信度)。总的来说,大多数短伽玛暴主机是恒星形成($\approx84\%$),与小部分的过渡($\approx6\%$)或静止($\approx10\%$);然而,我们观察到一个更大的部分($\approx40\%$)的静止和过渡主机在$z\lesssim0.25$,与星系演化相称。我们发现,短伽玛射线暴主机填充恒星形成的正常场星系的主要序列,但不包括许多高质量星系,这意味着他们的二进制中子星(BNS)合并的祖先是…
Physical characterization of the local system NGC 1313: A flattening in its chemical abundance by past interactions
Universidad de La Serena(拉塞雷纳大学);Universidad de Talca(塔尔卡大学);Vera C. Rubin Observatory(维拉·C·鲁宾天文台);Universidade de Saõ Paulo(圣保罗大学);Aix-Marseille Univ.(艾克斯-马赛大学)